Ford Performance Ring And Pinion Gear 3.55 Set 8.8" IRS 2015-2020

Ford Performance:
M-4209-88355A
Ford Performance Ring And Pinion Gear 3.55 Set 8.8" IRS 2015-2019 is rated 5.0 out of 5 by 1.
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Highlights

  • Quality Forged Construction
  • Perfect For Street & Track Use
  • Quiet Worry-Free Performance
  • Made In The USA
MSRP $249.00
$159.59
You save 36%

Ford Performance 3.55 Ring and Pinion Gear Set for all 2015, 2016, 2017, 2018, 2019 and 2020 Mustangs with the 8.8" IRS Rear End.

Ring and pinion sets have proven to be one the most popular modifications for just about any Mustang owner. So much about how your Mustang feels can be controlled by replacing the factory Ring and Pinion Gears in your 2015-2020 Mustang. Whether you’re looking for faster acceleration or a higher top speed, with this set from Ford Performance, you’ll have the correct top quality parts to take full control over your S550.

All Ford Performance (formerly Ford Racing) Ring and Pinion Gear Sets are made in the United States at Ford's Sterling Axle Plant. The lower the ratio (higher the number), the quicker your car will accelerate and you will feel the difference in the "seat of your pants". Ford Performance’s 8.8" gears are the choice of championship road racing and drag racing teams around the world. Featuring OEM quality, a superior surface finish, hardening and strict manufacturing consistency, this gear set will provide you the strongest and quietest performance on the market today!

Features and Benefits:
- Strong Unmatched Forged Construction and Quality
- Quiet Worry-Free Performance
- Corrosion Resistant Black Oxide Finish
- Perfect for Street or Track Use
- Made in the USA
- Professional Installation is Highly Recommended

Please Note: Requires M4210B3, the 2015-2020 Ford Racing 8.8” IRS Ring and Pinion Installation Kit

*Will NOT fit earlier 8.8-inch straight axles found in previous generations.
*Will NOT fit 2015-2020 Mustangs originally equipped with a rear-end housing with factory installed 3.15 gears. 

Tech Tip: After installation of your new FRPP 4.09 Ring and Pinion Gear Set, you will need to adjust the rear axle ratio in the body control module in order to re-calibrate your speedometer. This can be adjusted for if you have previously purchased one of the new Ford Performance Power Packs for the 2015-2019 Mustang. Calibration support for 2020 Mustangs is NOT available at this time.

If you're looking for parts for your 2015-2020 Mustang, you should start by looking at the several Mustang parts that CJ Pony Parts offers from Ford Performance (formerly Ford Racing). By buying your Ford Performance parts from CJ Pony Parts, you know you're getting your Mustang parts from a reliable, reputable dealer, since CJ Pony Parts is a Top 10 Ford Performance Dealer and has been for the last 10 years. When you buy your Ford Performance Mustang parts from CJ Pony Parts, you know you have a winning combination.

Installation Videos

Vehicle Fitment

This product will fit the following Mustang years:

Rated 5 out of 5 by from Get up and go The 3.55 woke up my 2016 Mustang GT. Highly recommend for anyone with a base GT and 3.15 gears.
Date published: 2018-05-23
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For a S550 Manual Transmission (3.31 Stock Gear) with the Ford Performance Supercharger 670 HP. What Gear you recommend? 3.55 or 3.73? I only use the car for fun and 201 meters races with M/T 28" Drag Tires, highway revs no matter for me

Asked by: Boris_Medina
For drag racing use the 3.73.
Answered by: rk cjpp
Date published: 2018-11-06

Do you carry the 3.31 gear set? Perhaps I'm missing it on the website. I have a 2017 GT PP with stage 2 whipple. The current 3.73 gears make street tires worthless in 1st and 2nd.

Asked by: Kevin17
3.31 are not currently available.
Answered by: CJPP Dave
Date published: 2017-11-10

I have heard some in the SC community suggest this swap to help with traction. I have the 3.73 pp setup with a roush SC and am destroying 305/35/20s. Does having 625 to the wheels change your "not really" answer on this swap?  Any experience?

Asked by: Blake57
As power increases, the need for a longer rear gear becomes a thing. 3.73s are typically way too aggressive on a 600+hp car. 3.55s will help slightly but a lot comes down to throttle control and mastering the art of slipping the clutch.
Answered by: CJPP Dave
Date published: 2018-01-20

I have the performance pack 373 gears any advantages in putting the 355 in instead?

Asked by: niko77
Not really.
Answered by: rk cjpp
Date published: 2017-06-16

Will the work on a 2015 ecoboost mustang with a automatic transmission with 331 gears ?

Asked by: FX4ST
Yes.
Answered by: CJPP Dave
Date published: 2016-10-24

Can I change the performance pack 3.73s to this 3.55.  The 3.73 is a Torsen.

Asked by: wildcatgoal
Yes.
Answered by: CJPP Dave
Date published: 2016-10-05

WHY WONT THIS WORK WITH A FACTORY REAR END WITH 3.15RG . THEY BOTH USE THE SAME HOUSING FR3Z-4310-A

Asked by: THOODLUM
The 3.15 housing is cast aluminum housing, you would have to switch to the cast iron housing to change gears ratio.
Answered by: rk cjpp
Date published: 2016-03-24

I have been told that the 3.55 Ring and Pinion will fit my 2015 Mustang GT with the stock  3.15 gears  if I also replace the limited slip differential Your website simply says the 3..55 gears won't fit. Can you clarify?

Asked by: Fred D
You are correct, the whole differential will need replaced to run the 3.55 gears. Take a look at this part for a complete solution: http://www.cjponyparts.com/ford-racing-differential-housing-iron-loaded-with-3-55-gears-automatic-2015-2016/p/M400188355/
Answered by: CJPP Dave
Date published: 2017-05-07
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